公开(公告)号：EP2878695A4

公开(公告)日：2015-12-30

申请号：EP13823507

申请日：2013-07-22

申请人： JFE STEEL CORP ,  JFE BARS & SHAPES CORP

发明人： OMORI YASUHIRO ,  UWAI KIYOSHI ,  MITAO SHINJI ,  IWAMOTO TAKASHI ,  ANDO KEISUKE ,  TOMITA KUNIKAZU

IPC分类号： C22C38/22 ,  C21D1/06 ,  C21D6/00 ,  C21D8/06 ,  C21D9/32 ,  C22C38/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/24 ,  C22C38/26 ,  C22C38/28 ,  C22C38/38 ,  C22C38/60 ,  C23C8/04 ,  C23C8/32

CPC分类号： C23C8/32 ,  C21D1/06 ,  C21D6/002 ,  C21D6/005 ,  C21D6/008 ,  C21D8/005 ,  C21D8/06 ,  C21D8/065 ,  C21D9/32 ,  C21D2211/002 ,  C21D2211/004 ,  C22C38/00 ,  C22C38/001 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/22 ,  C22C38/24 ,  C22C38/26 ,  C22C38/28 ,  C22C38/38 ,  C22C38/60 ,  C23C8/04

摘要： The present invention provides a steel for nitrocarburizing having excellent mechanical workability before nitrocarburizing, and showing excellent fatigue properties after nitrocarburizing, which is suitable for applying in mechanical structural components for automobiles etc. prepared by adjusting the composition so that it contains in mass%, C: 0.01 % or more and less than 0.10 %, Si: 1.0 % or less, Mn: 0.5 % to 3.0 %, P: 0.02 % or less, S: 0.06 % or less, Cr: 0.3 % to 3.0 %, Mo: 0.005 % to 0.4 %, V: 0.02 % to 0.5 %, Nb: 0.003 % to 0.15 %, Al: 0.005 % to 0.2 %, and Sb: 0.0005 % to 0.02 %, and the balance including Fe and incidental impurities, and setting the area ratio of bainite phase to the whole microstructure to more than 50 %.

公开(公告)号：EP2816128A4

公开(公告)日：2015-05-20

申请号：EP13748467

申请日：2013-02-15

申请人： JFE BARS & SHAPES CORP ,  JFE STEEL CORP

发明人： IWAMOTO TAKASHI ,  ANDO KEISUKE ,  TOMITA KUNIKAZU ,  OMORI YASUHIRO ,  UWAI KIYOSHI ,  MITAO SHINJI

IPC分类号： C22C38/00 ,  C21D6/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/22 ,  C22C38/24 ,  C22C38/26 ,  C22C38/28 ,  C22C38/32 ,  C22C38/38 ,  C22C38/60 ,  C23C8/32

CPC分类号： C23C8/32 ,  C21D6/002 ,  C21D2211/002 ,  C22C38/001 ,  C22C38/002 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/22 ,  C22C38/24 ,  C22C38/26 ,  C22C38/28 ,  C22C38/32 ,  C22C38/38 ,  C22C38/60

摘要： According to the present invention, it is possible to obtain steel for nitrocarburizing having a predetermined chemical composition, a bainite area ratio exceeding 50 % and excellent machinability by cutting before nitrocarburizing, and having strength and toughness equivalent to conventional steel, such as SCr420 carburized steel material, and excellent fatigue properties after nitrocarburizing.

公开(公告)号：EP3124638A4

公开(公告)日：2017-03-01

申请号：EP15769463

申请日：2015-03-23

申请人： JFE BARS & SHAPES CORP ,  NHK SPRING CO LTD

发明人： FUKUOKA KAZUAKI ,  TOMITA KUNIKAZU ,  TANGE AKIRA ,  KURIMOTO KIYOSHI ,  GOTO YURIKA

IPC分类号： C22C38/00 ,  B60G21/055 ,  C21D1/18 ,  C21D6/00 ,  C21D7/06 ,  C21D8/06 ,  C21D9/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/42 ,  C22C38/44 ,  C22C38/46 ,  C22C38/48 ,  C22C38/50 ,  C22C38/54 ,  C22C38/60

CPC分类号： C21D9/0068 ,  B60G21/055 ,  C21D1/18 ,  C21D1/60 ,  C21D7/06 ,  C21D8/065 ,  C22C38/00 ,  C22C38/002 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/42 ,  C22C38/44 ,  C22C38/46 ,  C22C38/48 ,  C22C38/50 ,  C22C38/54

摘要： A steel has a predetermined chemical composition with a balance being Fe and incidental impurities, wherein a sum of Cu content and Ni content is 0.15 mass% or more, and a crystal grain size after forming into a stabilizer shape and quenching is in a range of 7.5 to 10.5 in prior austenite crystal grain size number. Thus, a highly durable stabilizer steel that has a tensile strength of 1200 MPa or more and excellent normal-temperature and low-temperature toughness and is used in an environmentally friendly manufacturing process at lower cost can be realized.

摘要翻译： 钢具有预定的化学组成，其余量为Fe和不可避免的杂质，其中Cu含量和Ni含量之和为0.15质量％或更多，形成稳定剂形状和淬火后的晶粒尺寸为 原奥氏体晶粒尺寸数为7.5〜10.5。 因此，可以实现抗拉强度为1200MPa以上，并且具有优异的常温和低温韧性并且以低成本用于环境友好的制造过程的高度耐久的稳定器钢。

公开(公告)号：EP2397571A4

公开(公告)日：2016-08-17

申请号：EP10741269

申请日：2010-02-10

申请人： NHK SPRING CO LTD ,  JFE BARS & SHAPES CORP

发明人： KIKUCHI KATSUHIKO ,  TOMITA KUNIKAZU ,  TAMAI YUTAKA ,  HATTORI KAZUAKI ,  INOUE KANJI ,  TANGE AKIRA ,  MORI NORIHIKO ,  GOTO YURIKA ,  KURIMOTO KIYOSHI

IPC分类号： C22C38/58 ,  B60G21/055 ,  C21D1/25 ,  C21D1/28 ,  C21D9/00 ,  C21D9/08 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/42 ,  C22C38/48 ,  C22C38/50

CPC分类号： C22C38/02 ,  C21D1/25 ,  C21D1/28 ,  C21D9/0075 ,  C21D9/08 ,  C21D2211/002 ,  C21D2211/008 ,  C22C38/04 ,  C22C38/06 ,  C22C38/42 ,  C22C38/48 ,  C22C38/50 ,  C22C38/58

公开(公告)号：EP2377964A4

公开(公告)日：2017-06-07

申请号：EP09833364

申请日：2009-12-09

申请人： JFE BARS & SHAPES CORP

发明人： MURAKAMI TOSHIYUKI ,  TOMITA KUNIKAZU ,  SHIRAGA TETSUO

IPC分类号： C22C38/60 ,  C22C38/00 ,  C22C38/02 ,  C22C38/04

CPC分类号： C22C38/001 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/60

公开(公告)号：EP2708612A4

公开(公告)日：2015-08-05

申请号：EP12782769

申请日：2012-05-11

申请人： NHK SPRING CO LTD ,  JFE BARS & SHAPES CORP

发明人： TANGE AKIRA ,  KURIMOTO KIYOSHI ,  GOTO YURIKA ,  KIKUCHI KATSUHIKO ,  TOMITA KUNIKAZU ,  FUKUOKA KAZUAKI ,  HATTORI KAZUAKI

IPC分类号： C22C38/00 ,  B60G21/055 ,  C21D9/02 ,  C22C38/58 ,  C22C38/60 ,  F16F1/02

CPC分类号： B60G21/055 ,  B60G99/00 ,  B60G2206/427 ,  B60G2206/724 ,  B60G2206/8103 ,  B60G2206/81035 ,  B60G2206/8401 ,  B60G2206/8402 ,  C21D1/18 ,  C21D1/40 ,  C21D1/42 ,  C21D6/005 ,  C21D7/06 ,  C21D8/065 ,  C21D9/0075 ,  C21D9/02 ,  C21D2211/002 ,  C21D2211/008 ,  C22C38/00 ,  C22C38/002 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/12 ,  C22C38/14 ,  C22C38/16 ,  C22C38/42 ,  C22C38/48 ,  C22C38/50 ,  C22C38/58 ,  C22C38/60 ,  Y02P10/253

公开(公告)号：EP3276023A4

公开(公告)日：2018-01-31

申请号：EP16768070

申请日：2016-03-24

申请人： JFE STEEL CORP

发明人： KASAI MASAYUKI ,  IWAMOTO TAKASHI ,  TOMITA KUNIKAZU

IPC分类号： C22C38/00 ,  C21D1/06 ,  C21D8/06 ,  C22C38/60

CPC分类号： C22C38/60 ,  C21D1/06 ,  C21D1/20 ,  C21D1/74 ,  C21D7/13 ,  C21D8/0226 ,  C21D8/0263 ,  C21D2211/002 ,  C21D2211/004 ,  C22C38/001 ,  C22C38/002 ,  C22C38/008 ,  C22C38/02 ,  C22C38/06 ,  C22C38/20 ,  C22C38/22 ,  C22C38/24 ,  C22C38/26 ,  C22C38/28 ,  C22C38/30 ,  C22C38/32 ,  C22C38/38 ,  C22C38/42 ,  C22C38/44 ,  C22C38/46 ,  C22C38/48 ,  C22C38/50 ,  C22C38/58 ,  C23C8/26 ,  C23C8/32

摘要： Disclosed is a steel for nitrocarburizing whose mechanical workability before nitrocarburizing treatment is guaranteed by ensuring fatigue resistance without causing the steel to harden before subjection to nitrocarburizing treatment, and a method of producing the same. The steel for nitrocarburizing has a chemical composition that contains C: 0.01 % or more and less than 0.20 %, Si: 1.0 % or less, Mn: 1.5 % or more and 3.0 % or less, P: 0.02 % or less, S: 0.06 % or less, Cr: 0.30 % or more and 3.0 % or less, Mo: 0.005 % or more and 0.40 % or less, V: 0.02 % or more and 0.5 % or less, Nb: 0.003 % or more and 0.20 % or less, Al: 0.010 % or more and 2.0 % or less, Ti: more than 0.005% and less than 0.025 %, N: 0.0200 % or less, Sb: 0.0005 % or more and 0.02 % or less, and the balance consisting of Fe and incidental impurities, with the chemical composition satisfying a predetermined relation; and a steel microstructure that contains bainite phase in an area ratio of more than 50 %.

公开(公告)号：EP3252182A4

公开(公告)日：2018-01-24

申请号：EP16742975

申请日：2016-01-25

申请人： JFE STEEL CORP

发明人： ANDO KEISUKE ,  FUKUOKA KAZUAKI ,  TOMITA KUNIKAZU

IPC分类号： C22C38/00 ,  C21D1/06 ,  C21D1/28 ,  C21D9/32 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/18 ,  C22C38/32 ,  C22C38/60

CPC分类号： C21D9/32 ,  C21D1/06 ,  C21D1/18 ,  C21D1/28 ,  C21D6/002 ,  C21D6/005 ,  C21D6/008 ,  C22C38/00 ,  C22C38/001 ,  C22C38/002 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/18 ,  C22C38/24 ,  C22C38/26 ,  C22C38/28 ,  C22C38/32 ,  C22C38/60 ,  C23C8/22

摘要： A case hardening steel having excellent fatigue resistance is provided at relatively low production cost. A case hardening steel has a chemical composition containing C: 0.10% to 0.30%, Si: 0.10% to 1.20%, Mn: 0.30% to 1.50%, S: 0.010% to 0.030%, Cr: 0.10% to 1.00%, B: 0.0005% to 0.0050%, Sb: 0.005% to 0.020%, and N: 0.0150% or less in a predetermined range, and further containing Al: 0.010% ‰¤ Al ‰¤ 0.120% in the case where B - (10.8/14)N ‰¥ 0.0003%, and 27/14[(N - (14/10.8)B + 0.030] ‰¤ Al ‰¤ 0.120% in the case where B - (10.8/14)N

公开(公告)号：EP1338665A4

公开(公告)日：2005-11-23

申请号：EP01980929

申请日：2001-10-29

申请人： JFE STEEL CORP

发明人： FUNAKAWA YOSHIMASA ,  SHIOZAKI TSUYOSHI ,  TOMITA KUNIKAZU ,  SAITO TAKANOBU ,  NAKATA HIROSHI ,  SATO KAORU ,  SUWA MINORU ,  YAMAMOTO TETSUO ,  MURAO YASUHIRO ,  MAEDA EEIJI

IPC分类号： B32B15/01 ,  C21D8/02 ,  C22C38/02 ,  C22C38/04 ,  C22C38/12 ,  C22C38/14 ,  C22C38/00 ,  C21D9/46 ,  C22C38/38

CPC分类号： C23C2/40 ,  B32B15/013 ,  C21D8/0226 ,  C21D2211/004 ,  C21D2211/005 ,  C22C38/02 ,  C22C38/04 ,  C22C38/12 ,  C22C38/14 ,  Y10T428/12799

摘要： The present invention relates to a high strength hot rolled steel sheet containing 0.15% or less C, 0.02 to 0.35% Ti, and 0.05 to 0.7% Mo by weight percentage and consisting essentially of a matrix of ferrite structure single phase and fine precipitates with a grain size of smaller than 10 nm dispersed in the matrix, for example, a high strength hot rolled steel sheet which consists essentially of 0.06% or less C, 0.5% or less Si, 0.5 to 2.0% Mn, 0.06% or less P, 0.005% or less S, 0.1% or less Al, 0.006% or less N, 0.02 to 0.10% Ti, 0.05 to 0.6% Mo by weight percentage, and the balance being Fe, wherein fine precipitates with a grain size of smaller than 10 nm are dispersed in a matrix of ferrite structure single phase at a number per unit volume of 5x10 /mum or higher. This steel sheet, which has tensile strength of not lower than 550 MPa, high elongation and excellent stretch flangeability, is suitable for intricately shaped automotive chassis parts such as a suspension arm.

摘要翻译： 本发明涉及一种含有0.15％以下的C，0.02〜0.35％Ti和0.05〜0.7％Mo的高强度热轧钢板，主要由铁素体结构单相和微细析出物组成， 分散在基体中的小于10nm的晶粒尺寸，例如基本上由0.06％以下的C，0.5％以下的Si，0.5〜2.0％的Mn，0.06％以下的P组成的高强度热轧钢板， 0.005％以下的S，0.1％以下的Al，0.006％以下的N，0.02〜0.10％的Ti，0.05〜0.6％的Mo，余量为Fe，其中微细析出的晶粒尺寸小于10 nm以5×10 4 / m 3以上的单位体积数分散在铁素体结构单相的基体中。 该拉伸强度不低于550MPa，延伸率高，拉伸凸缘性优异的钢板适用于悬挂臂等复杂形状的汽车底盘部件。

公开(公告)号：EP1403393A4

公开(公告)日：2005-01-05

申请号：EP02745824

申请日：2002-07-04

申请人： JFE STEEL CORP

发明人： YAMAUCHI KATSUHISA ,  KOBAYASHI AKIO ,  TOMITA KUNIKAZU ,  MURATA SAIICHI ,  IIZUKA SHUNJI ,  MATSUOKA HIDEKI

IPC分类号： C21D8/02 ,  C22C38/04 ,  C22C38/08 ,  H01J29/07

CPC分类号： H01J29/07 ,  C21D8/0205 ,  C22C38/04 ,  C22C38/08 ,  H01J2229/0733

摘要： A thin alloy sheet having a low thermal expansion which has a substantial chemical composition in mass %: Ni: 35.0 to 37.0 %, Mn: 0.01 to 0.09 %, Si: 0.01 to 0.04 %, Al: 0.01 to 0.04 % and balance: Fe, with the proviso that Mn/S is 20 to 300 and Mn + Si + Al ≤ 0.15 %, and has an average thermal expansion coefficient in the range of 20 to 100˚C of 1.0 X 10 −6 /K or less. The thin alloy sheet is free from the occurrence of a crack, a fracture or a flaw and exhibits good etching characteristics and dimensional precision in the manufacture of a shadow mask.